public static StackValue generateCallReceiver(
        @NotNull ResolvedCall<?> resolvedCall,
        @NotNull ExpressionCodegen codegen,
        @Nullable Callable callableMethod,
        @Nullable ReceiverParameterDescriptor dispatchReceiverParameter,
        @NotNull StackValue dispatchReceiver,
        @Nullable ReceiverParameterDescriptor extensionReceiverParameter,
        @NotNull StackValue extensionReceiver
) {
    ...
    if (extensionReceiverParameter != null) {
        jvmKotlinType = calcExtensionReceiverType(
                resolvedCall, extensionReceiverParameter, typeMapper, callableMethod, state
        );
        ...
    }
    ...
    return new CallReceiver(
            dispatchReceiver, extensionReceiver, jvmKotlinType.getType(),
            jvmKotlinType.getKotlinType(), secondReceiverType, secondReceiverKotlinType
    );
}